Process of briqueting coal and the waste materials thereof.



l() SHEETS-SHEET l.

Paltenfed Mar. 2, 1909.

G. B. DAMO'N. PROGESS OF BRQUETING GOAL AND THB WASTE MATERIALS THEREOI. A`PPLIOAT-ION FILED SEPT. 3, '1908.

7e/Jara for E E. E. DEMON; EEooEss 0E EEIQUEEING GOAL ENE TEE WASTE MATEEIALS TEEEEOE.

EPJLIOATEON FILED sEP'E.3.19oE.

Patented Mar. 2, 1909.

mwMMMMuwuMwwMHlluh HfwHUhwHWUHNIWJW 1 l l |1 \K\. ililijliir I l I 1 l 9 Il llllll 1i |lll 01.3. DAMON. PROCESS 0F BRIQUETING COKL AND THE WASTE MATERIALS THEREOF.

APPLIO-ATION FILED SEPT.3,1908.

Patented Mar. 2, 1909.'

1o SHEETS-SHEET G. B. DAMON. y PROCESS OF BRQUBTING GOAL AND THE WASTE MATERIALS THEBEF.

APPLIGATXON FILED SEPT, 3, 1908 1 V i I Patente@ Mar. 2, 1909.

10 SHEETS-SHEET G. B. DAMON. PROCESS 0E BEIQUETING GOAL AND THE WASTE MATERIALS THEEEOE.

APPLICATION FILED SEPT.3,1908. y 914,248, Patented Mar. 2, 995.

10 SHEETS--SHEEJ 5,

G. B. DAMON.

PROCESS 0F BRIQUETING GOAL AND THE WASTE MATERIALS 'THEREOL I APPLICATION FILED SEPT. 3. 1908,

A 55224@ Patented Mar. 2, 1909.

l0 SHEETS-SHEET 6.

I G. B. DAMON. PROCESS OP BRIQUE'IING/` COAL AND THE WASTE MATERIALS THEREOF,

f n l y APPLICATION FILED SEPT.3,190`B. Qj2 Patented Mar. 2, 1909.

10 SHEETS-SHEET 7.

G. B. DAMONg PROGBSS 0F BRIQUETING GOAL AND THE WASTE MATBRXALS TH EREOF.

Pasentad 10 SHEETS-SHEET 8.

p APPLICATION `FILED SEPT, 3, 190B, @fyg v G. B. DAMON.

PROCESS OF BRIQUETING GOAL AND THE WASTE MATERIALS THEREOP.

I APPLOATION FILED SEPT. 3, 190B. 914,248. y Patented M3112, 1909.

10 SHEETS-SHEET 9.

@Witnesses DAMON. y PROCESS 0F BRIQUBTING GOAL AND THE WASTE MATERIALS THEREOF. 9 1 4,248.

ME E

dw e0 dition.

'rirrnn srnrns .ar-snr onirica.

' encuen BERNHARDT nanou, or cLENsrDE, PnNNsYLvANrA.

l`IIRCESS 0F BRIQUETING COAL ANB THE WASTE MATERIALS TEREOF.

Specification of Letters Patent.

lilatented March 2, 1909.

.Application filed September 3, 1908. Serial No. 451,619.

The object of my invention has. been tol provide a process of preparing for bri 'ueting and 'briqueting' fine anthracite an( bituminous-coal, and anthracite and bituminous Waste materials, which shall have among others the advantages hereinafter stated. By fineii anthracite coal, l mean coal not substantially larger than buckwheat, and by iine bituminous coal, l mean coal of av ,size not larger than buckwheat in .an-

thracite coal.

Among the advantages are: That of opf erating upon such materials in a dry conf That of both operating vupon such materials in adry condition, and being continuous and uninterrupted in its operating on them. That of not requiring an vta/sh# ing at any stage of the process. iihat pf, utilizing substantially all the carbon in-tl; said materials, ing, or not requiring that heat be supplied from any other source than the material bein(T treated. That of not only .deriving all the heat and power for my process from the vvastre materials vof the process,'but of `also supplying power from such materials for purposes not connected With briqueting; and to" such ends my invention consists in the process of briqueting coal and the Waste materials thereof hereinafter specified.

In the accompanying drawings Figure 1 is a diagrammatic view, showing apparatus suitable for the practice of my said process;

Figs. Ztand are, respectively, a side ele-v vation, and a vertical sectional View of a drier adapted for use in the said apparat-us. Fig. 4 is afront view of. the drier; Fw. 5 is a transverse sectional viev'v of the said drier; Figs. 6, 7 and 8 are respectively a lvertical longitudinal sectional View, a vertical trans- .verse sectional view, and a plan view of the separator adapted for use with my apparatus; Fig. 9 is a frontclevation, partly broken away, of a furnace adapted for use with my said apparatus; Fig. i() is a vertical That of being self-support'L and the boiler to which it is applied; Fig?.

sponding numbered section lines of Fi 10.

In` the production of anthracite coalg, the coal is mined 'in as large lumps as possible, and vis then passed through a breaker to break it up into smaller sizes and to'assort and clean the coal. This results in the production of 'a considerable percentage of coal that is too small forsatlsfactory saie, because of the competition of bituminousl coal. By my process,V this smalll coal can be crushed down to a suitable size for briquetits'dust removed and thepercentage of incombustible material -can be reduced, if necessary, and the useful material can then be briquetcdl Thev mining of anthracite coal also results in the production of a large amount of material containimr dust and coal too small for satisfactory conibustion by the ordinary processes. This material is known as cuire vThe culml is ltoo high in incombustible material for satisfactory combustion by the ordinary apparatus.- It is also too fine to burn satisfactorily on a grate. I desire by my process to make briquets from culm which shallI burn substantially as Well as the domestic sizes; coaL -I-n order to produce satisfactory briquets from culm, it is not only necessary-that the percentage of inronibustible materials 'Ould certain-size should be removed., because the amount of; pitch necessary to bind. the art-icles into a briquet is proportionately arger for small particles thau'for. large particles, as tl e amount of pito'hiecessary to coat a small particle is proportionately larger than to coat a large particle. Pitch is expensive,c and it is, therefore, not econmnical to make briquets of material that is'too fine. Therefore, another object of my invention li as been to remove the dust which is too fine for use in briquets. 1

lt is also desirable that the particles `of a briquet sh all be of substantially unitorin eine, because this is necessary to secure satisfac` tory combustion of the bri net under ordinary cimulnstances. The 'arger particles smaller martinica, if the partir-tes`l beof litten ,l ent sizes, and therefore combustion Wiiilongitudinal sectional View of said furnace ing.; its particles can be assorted as to size,v

be reduced, but that the particles below a Wiil necessarily burn more siowly than the 11, 12 and 13' are views-taken on the correwe r 1 r Laer avana-ar corr K Q v 914,248

progress from the outer surface of ,the briquet toward the center 1n an uneven manner, and

this uneven con'ibustion Will ordinarily result4 in smoke. lf t; e particles are of substan tially imiter-ni size, the combustion will pro- 'gress'evenly, and there Will be a'ininimum of smoke.

Therel'ore, another object of my 1nvent1on has been to so assort the particles that the briquets may be made of particles oi' substantially.uniform size.

In the production of bituminous coal, there is much material which is so small that.

`it cannot be satisfactorily gasiiied ner be burned'on rates and there is Waste material g which is undesirably .high-1n ineombustibles.

' lt isalso desirable to -be able to reduce t'e.

appear. gMy pr cess is capable of employment by the use/of diilerentf/o-'ms of app'ara-. v tus, and "y1/'ith variationsiI y*the oi'der of s eps.y The paEiCularprQcedu e ,even With eu/ m therefore/,to taken' as merely illustrativeof 'which it might be practiced.'

tus i lustratedf is te'befftalren aspirer-ely illuysf` trative of eine/of {na} )y tornis oitpfparats b' Thev culm 1s earriedf/frolnjt ebrealier. by1 currents of Water lowjl-ng threuglrwhat'are known. as chutes, and is thereliore.satu.-

rated with water.- 'lnipfrepajfation for fray v drained out.

process7 the culirf is receiyedfrom thel slush chutes in cars and permitted' to stand thereii'i until all of the Water Which-Will drain is.

' Thus; the moisture Which has. to be driven olli by heat is reduced to a rninimum. TheA hrst step of the process isthe dr Tinfr of the eulm to drive ofi' 'the remainder c ol the moisture. This may be accomplished 1n any-forni of drier. n

That form of drier'which l have Achosen f .for illustration is as 'iollofrsf vThe drier com# ,prises a cylinderniounted inan inclined position in a casmg, the cylinder being rotated upon its axis. The material to be driedis fed into the u per end ol' the cylinder' and travels througi Athe cylinder,` owing to the inclination' and the rotation of the latter,

'and is heated and dried during its passage V In the aecompanythrough the cylinder'. ing-drawings, the cylinder 1 has; an upper shaft 2 and a lower shaft 3 secured in it by means of spiders, the shaft 2 being mounted .in a bearin on apici' atLthe front of the drier., and t eshaftS being mounted i'n a bearing on the rear wall oil the drier.- The cylinder'is prevented from slipping to the leftfin Fig. 3 by means oi' a collar on the up er end oi'btlf'v shaft. The shalt 3 is prov1 ed with a Wneel Ll, or other means 'for ro tating it.' The viront wall 5, of the drier has anopening to receive the end of the cylinder, and a ilanged plate 6 closes the open'in in the Wall, the flange 7 projecting slightly into the cylinder. is fastened to the said' plate and opens through the latter, The material to r-be dried is fed into the o en upper end oi the chute and asses intot e cylinder. The cylinder is inc osed ina chamber formed by the front Wall 5, a rear Wall A9,'side Walls 1() and 11, and a top Wall 12. A' gas burner 13 is mounted in the iront Wall, and throws its amerearward through an opening in such A chute to receive `the culin v Wall. The flame is received in a chamber formed by the Wall 5, a rear wall 14, the side Walls 10 and 11,.andan arched top 15; The y rear wall 14 is checkered. The gases of combustion, after passing through the checkered Wall, pass around the cylinder and 'escape throu h anopening 16 1nl the top wall 12, and t usI enter a horizontal passage 17, formed on the said top Wall. In the l.passage y 17 there is a damper 18 at the iront ofthe opening 16, and a dampery 19 to the rear ol' such opening. Atthc rear end of the 'cylindera Vertical 'passage 1s lorined 1n the rear --w'alL w ich passage opens at its upperend .into t/ epassa e 17, and at its lower -end is pentr'acted to' Terni' a chute 20. '.At its for- Ward'end the passage 17 .is connected by a -.,-'pipe'.21.with a dust-chamber 22 built pref-A I .ierablyat tli'e side of the drier proper. The' pipe 21 is rovided with a damper 23. The

ust cham er has a stack 24 opening through its reef,4 and is provided with a hopp formed of inclined sides, and a screw conveyer 25, or other forni of eonveyer, 1s

mountedlin its..bottom,y suitable gearing tie-I ing4 provldedfor driving the conveyer. y fan 26 has its suction pi e 27 connected with the passage 1 7 and its eliverypipe 28 connected with Athe dust chamber. Air spaces 29 are provided in the' side Walls 10 and 11, I i

-is desired tol-have the' gases pa'ss through the cylinder, "the-5 damper 18 is closed.' and the er- .shaped bottomythat'is, with va bottom iro sieges damper .is opened, thus causing the gases to rearward and downward, sind to enter the rear end of the cylinder. They thence poss lomvard and are drewn through vthe pipe by theeuetion of the fon, end are forced into the dust vchan'iber. The gases when passing i this manner Carry a Certain amount oi' the clust oi.l the material with their. into the dust chamber. The dried material falls into the chute and is oerried by a conve-.yer to the separator, which erthe next step in my process. if 1t is not desired to have the gases pass through the cylinder, the rear damper i9 is closed and the i'o1'uutid-tla1nper i8 opened, and the pass by ineens of the passage 17 .eetly to the las, and by it are forced into ln this instance, the damper 23 in the Dipe 2l would be closed.

WL le l have illustrated a torni' oi drier whirh l pre-ier, there obviously many other for-ins of driers which could be used in place of it.

'From the chute 20 ol thedxier, the me lf-rial passes to a eeaarator which separates the dust and. ineomimstible material ot the 'ruim ai 'the portion ti eet which is sufficienti, riel'i in carbon, and that is large enough to briquet, and whielx also properly .o .frailes the material as to the dust Chamber.

l oo as the @neral process 'viitli Wlrieli the 'subject ot' tl x present application is concerned., said f :farator maybe eonstrueted in any manner,

s dition.

The separator which .ll have chosen tor illustrati-imi is one Whielr the subject of :un 'heir applieation for stent, and which is l ihlfrr-tore not specifica ly ielaimed in the le meseut application. Such se arator, as i inst-rated in liigs. 4r, 5 and', comprises a freine vork supporting in its upper orti-on rollers 4() and 41, over which rum a welt 42,

upon. which the eulrn is deposited from the conveyor of 'the drier. The upper surface of the belt runs toward the left in Fig. 4. Beneath the roller 40, and in *position to catch the talling'eulm, is a hopper 43 having parallel vertical. sides, and inclined hot-toms 44 and 45 The. inclined bottom stands a little above the bottom 44, so that the colin may slide down the hitter and beneath the former. ',Vlhe m thus falls from the lower-.end ot' the bottoni 44. in a uniform stream. The lower end of the bottoni fie extends into a closed chamber, 'eferablyv having a Width approximately .1. .yual to that of the said bottoni, and having,r Y side wills t6 and 47 parallel to each other, and preferably having a length and height oxinrately equal. The chamber is closed as it leaves the mil-ni in a dry oon.-

" iront and rear walls 43 and 49, respec".

the entire bottom. Each bin isv closed by a hopper bottom having in it a sliding door 54, and which door has beneath it a belt 55, that is adapted to vcarry away the material falling through the door, Over each division wall of the bins, I .preferably arrange a movable rider or guard 56. This rider or guard has forwardly and 'rearwardly inclined u per faces meeting at an a ex, and it can be shifted over a division Wall ietween the bins, forward or back, within' the limits ot the length of its base, thus in effect shifting the division wall between the bins so as to exactly divide the material which is to go into the respective bins. In the front Wall 48 is an opening''?, thot is preferably Well up toward 'the level .of the lower end of the bottom 4.4. ln the rear wall l-Qis an opening 58, Whose area is vlarger than vthe opening 57 in the front wall. I nd goed results to be obtained bj making the rear opening approximately twice the area of the front opening. The lheight of the rear opening is determined by hthe special conditions, which will be stated later in describing the operation of the appsrotus.

uit the rear of the separator chamber proper is a chamber formed by the Wall 49, and a partition 59, which, starting at its'foot, near the Wall '19, preferably extends upward and rearward at a slight inclination to form o hopper-like bottom, the said partition eX- tending tothe roof, and the said chamber being closed at the sides by side walls 46 and 47. An opening 60 is formed in the partition 5), approximately opposite the Opening and' a suction fan 6], or other form of' suction apparatus, is connected with said o )ening to exhaust air from the space inelosed, and thus to draw air through the opening 58. The process .which is practiced by the illustrated dry separator is based on the discovery that the iner dust in culrn is the part thereotl highest in percentage ot ineoniloustible material. It has heretofore been believed that the dust in culrn was largely Dure coal..- This process is also based on the 4iurther discovery that by Ineens of a current of air, formed by suetion'produced under certain conditions near a falling stream of onlin, lf een separate this. tina, comparatively inoonibustible material fronrthe larger, more 'useful material, and can also' assort the larger material to great advantage. In the said separator, the opening between the bottoni 45, and the bottoni 1&6, is adjusted to permit a stream ol oulm of sullicient quantity to pass to malte rapid operation possible, buty not-oi' sufficient thickness to prevent ed umtageous eotion of the air.' The suction apparatus being, in operation, a strong eur-rent of air enters through the opening 57, andstriking the trilling stream of culm,leaus`es"the particles to. tall at greater o'rless distances rearward oi' Ithe vertical, according to the int? the bin 51'. which is high insl'zfe and weight of. the particles. The bon coal, pyrites, and larger particles of coal fa l The briqueting material,

falls into the bin 52, and the dust and material which is too fine for bri ueting, and' which contains the incombusti le material in the form of powder, falls into the bin 53.

'- The various factors influencing the separating may -be stated as follows: The` suction causes the air to pass in substan tially straight lines from the opening '57 to the opening 58, and 'an accurate separation of the material, according to the sizeand specific grav1ty is effected. I have found that if a blast 4be forced through the o ening 57, instead of a suction. drawn throng the opening 58, great confusion will occur within the chamber, and

eilicient separation will not take place. The

velocity otthe air is adjusted to the size of the coal being treated; the larger thecoal,

the higher the velocity.

vaccording tti'the `velocity of the air to be used,

since it is evident that if the velocity of the air be'increased, the material which should fall into vthe bin will fallinto bin 5l, and 'so with the bins 52 andl 53. has incombustible 'material in comparatively large pieces, the rear rider is moved somewhat tothe rear. If the incombustible material in the shape oimpalpable powder is present to an unusual extent, the rear rider be il the opening were lower down.

` v1s moved forward.. If' a high velocity of the air is required, both riders will he' moved.

rearward, and vice versa. I find it ad vantageoustoI lace-the openlng 57, well up toward thet evel of the bottom 44, vbecause the. air in this position strikes the material before' it has acquired much velocity, and therefore the material is subjected to the action of the current of air for a longer time than it would This is of importance, because I lind that if the front the -incombustible opening be made too large, good separation of the carbon and 'incoinbu'stible material is not ellected. I hud the best results to be ol;-

tained by making the area ofthe-rear opening larger than. that of the front opening. I also hndv 1t 1s advantageous io locatethe rear opening higheror lower, according to the particular conditions. A certain amount. ot

dust

" through this opening into the chamber in .the

rear. If the opening be too high, the dust does not pass through it as Well as if it be lower. I rave also foundthat 'if the coal be flaky, it is more easily carried by the air, andit is then an advantage to have the rear opening h1gh; whereas, if thel coal be granular',l it

carbon and not too fine,-

If 'the culin can vbe .carriedl .mwah more disarray carried by uw air, and

it is more advantageous to have the rear' opening low.' The coal kis iiaky er granular according to the wood of which it is formed, and usually the bulk of the material Abeing treated at any one time will all be of the same general character, that is, iialry or granular. A door, .ofany convenient sort, into the rear chamber is provided, so that the dust may be removed therefrom. While I have indicated the conditions to obtain the vbest results, af fairresult can be obtained notwithstanding many ol such conditions 4are not observed. It'will thus be seen that the agents controlling the various conditions are the relative cross-sections and locations of the front and rear openings to each other, and to the bins, the-'Velocity of the air, and the location of the riders.

The bony coal, pyrites, and large particlesl of coal, falling into the bin 51, are carried by its belt 55 to a gas producer 62, of any de-v sired type. As noparticular type of gas producer is required, the gas producer is not illustrated in detail.

The materia in the. bin 52, which it high in v4carbon and suitable for briqueting, is carried bythe belt 55, of such bin, to the'briqueting machine 64,- and there briqueted. The briqueting machine may be of any desired type, and as its construction is well known, it is not herein illustrated.-

I desire to burn the dust and material high in carbon in the bin 53, and from such combustion, together with the heat from the gas producer, and heat to be obtained from dust separated in the drier, to produce. all the heat utilized in the entire process. I therefore convey the material from the bin 53, by its be t 55, and also the material from the dust cv amber of the drier, to a furnace 67. Dust-does not burn well on a grate. It packs too tightly, and if vthere -be enough pressure ol air to supply'the air needed for combustion, it "honeycoinbsJ the bed, resulting in'too much air passing .through in some places and'not enoughin others, and in blowing the dust through the furnace With- .out burning it. If there'be not enough air,

it results in a dull,-red, smoldering fire.- To

overcome these objections, I have devised a furnace which I am about to describe and which 1s the subject of a separate application .for patent, executed of even date herewith.

The essential feature of my said furnace is that the dust is deposited ena/surface pre. heated to a sufhciently high degree, refer` ablyA to incande'soence., so that'the cai', onjof the-dust unites with the oxygen to form carbonio oxid, and such gas is then burned. I

prefer to heat the said surface by gas produced frein thesaid gas producer.

' Speci'fically, my' furnace comprises side walls, a front wall 69, a rear Wall 70, and

an arched roof 71. Within said Walls'are longitudinal, vertical walls 72, which snp ort a comparatively thin plate, bed, or com us tion surface 7 3,'that is preferably formed of refractory material, such as silicaA tile. The

said bed is supported at intermediate points bustion surface is preferably a bridge Wall 79,-

and above it an opening 80 for. the escape of gases beneath .the boiler; The passages 77 also, communicate by openings' 8l with the space beneath the boiler. Each passage 77 has at its forward end a burner S2 that is supplied by from the gas producer. The coal dust is'deposited bythe belt 55, of the bin 53, and. by conveyer from the dust chamber of the drier in the hopper 83, -andpasses from said hopper, as by pipes 84 to openings 8.5 in the roof 71 above the combustion surface, and the dust isthus deposited'upon the combustion surface'.I Air to burn the carbonio oxid, formed'by the .heating of the dust upon the combustion surface, enters 4the furnace by *openings 85, at the sides, and passes to the forward ends ofthe passageways 78. -It here divides, and passing through said passage- Ways, reaches the forward end of the fur# nace, it having been heated by passing beneath the floor formed by the Webs 76,'Which orm the bottoms of the combustionchamers. nace enters lateral passageways 87, and thus reaches vertical spaces 8S between the walls 72, and theside Walls 38, the air rises to, and passes over the combustion surface, and there, in its preheated condition, 'combines with the carbonio oxidof the culm dust. In order that the incombustible material may be scraped oliy the combustion surface, doors 89 are provided in the side Walls of the furnace to give access Ato Vsuch surface. rl`he ashes thus formed fall through the passageivays S8, and are removed at the bottom through doors 90. In the operation -of the said furnace, the burners fed by the producer gas, heat the combustion plate prefn erably at least to a red heat and preferably to incandesccnce. These ygases pass under the boiler and serve to heat it. The `culm is de osited on the combustion surface, preferably in a thin la er and is there heated, and its car om'coxid liberate The carbonio oXid unites with the air which has been preheated by passing through the passages beneath and round the chambers 77, in which the producer gas is burned, and

thus highly efficient combustion of the car- The air at the -fornf'ard end of the fur.

In this v'manner uickly bonie oxid occurs. Thegasesfrom this com-'1 bustion` pass beneath the boiler. By theuse.

of the said furnace, the dust from the bin 53,

of the separator and from the drier is burned under beneficial conditions, and this' together with the gas of the gas producer,

produces not only sufficient hea-t and power forV all purposes ofrny apparatus, but also produces a surplus of power. which is a Waste materialandvfhich is a large percentage of the entire bulla of the culm, is rendered useful, and serves a purpose which would otherwise v'require the' valuable coal or briquets. f The gas from the producer is not only used to supply direct heat by `combustion for my Thus the dust,

furnace, and to lheat the drier, the pitchmelting apparatus, the briqueting .1naehine, andthe preheater nd mixer of the lattea', I

but it may also sup ly energy by combustion in internal combustion eng'nes t'o the rotary drier; to the separa `or, to the briqueting ape paratus, elevators, conveyers, etc.,y and also preheats the surface on which the dust is urned.

'With my process it is not necessary either 'to dry the culni when Wet with an excess of Water, such as would be present if it were 'gust taken from a Wet separator, vor to handle it and store it While Waiting for "such excess to drain off. I

No fuel from any outside source needs to be Asupplied to practice my process. All of the useful material is utilized (that which is -large enough so as not to require an excessive quantity of pitch to briquet it),and yet all the heat and ower required are produced Which is either' too line to be briqueted, or in the bony .coal and very large particles.

lflhile` I have illustrated the procedure which affords the best results from my process, there are many variations whichcan be made Without seriously impairing the result, and it is obvious that equivalents. can be substituted for various of the steps therein. I therefore desire not to be limited beyond the requirements of the 'prior art and the necessary intendment of my claims.

The apparatus illustrated herein is not claimed in the present application, but is the subject of separatev applications for patent. The process of separating coal and waste ma terials is likewise the subject of a separate aplication for patent, aml the process of burnl m0* the dust, and other fine ma* ^rial is the subject of a separate application 4.or patent.

I claim:

1. The process of briquetingI fine coal and the Waste material of coal, com rising first prising rst substantially drying the culm",

then separating the incombustibles, and then briqueting the remaining material. 3. The process of briqueting iine .coal and the Waste materials thereof, com rising first substantially drying the materialthen separating the dust -from the material, and then Without su bsequently wetting the material,

separating the incoinbu'stible material and briqueting the remainder suitable in size.

, 6. The process of briqueting culm,'com' prising iirst substantially drying` the culm,

culm, separating the incombustible `material and briqu eting the remainder suitable-in size. l25. 7. The continuous process 'of briqueting culm, comprising substantiallyA ,drying thel culm, separating theV dust and larger material from the culin, briqueting the remainder thereof suitable in size, and utilizing the heat l of combustion. of the 'larger materialto dry' the incoming culm. i 8. The processor" briqueting fine coal and the Waste material thereof, comprising sub#v 'stantially drying material4 separating the dust from the material, andbriqueting the latter material suitable for briqueting Without intermediate drying.-

9. 'The recess of briqueting culm, conci-v prising5 ,su stantially dryingf the material 40 'se ara-ting the dust from the material suit ab effor briquetin, and briquetin'gfthe latter' L niatiialfwithout'intermediate drying;v

'10,v [The process oi briqueting fine coal andj the` Waste -matelial thereof, comprising first substantially drying the'niaterial, then se a rating-the dust l'from the mateiialsuita le Afor 'briqueting then briqueting vthev said-maf; terial, and burning the rejected material to' furnishl 'beati-or dryinflr andigbriqueting.: A

11.-The process of liiiq'ue'ting culm, coin- ,itieii'gseparatingthe dust from the briquetable materisL-then briquetiii'gfthe said mate-.

rial, and-burning the rejected ,material telf f 'ng the culin piising'-irstj substantially d ',tlien'sep'arating the dust an. the bonycoai 'from theculm ,producing gas from saidbony coal, .heating a'coinbustion surface by means of said gas, and burning the dust fromthe separation on such surface.

I 13. The continuous process of bri ueting` Y line coal and the waste material t iereo f 'comprising first substantially drying the coal,

' ing'the remainder.

then separatin(r the dust andthe .larger par-A ticles from the briquetable 'm at'erial, briquet ing the said material; producing gas-from said larger particles, heating one 'side of a combustion surface with the gas thus produced, 7o burning said dust on the opposite side of 'said surface, and conveying the heat thus roduced Ito the drier and briqueting niaciiine for operating upon subsequent portions of the material.

14. The continuous process o-,briqueting culm, comprising first substantiallyr dryingthe culm,l then separating the dust and #the bony coal from the culni, briqueting the remainder of tlie culm, producing gas from the bony coal, heating one side of a combustion. surface Withthe as thus produced, burning the said dust on tzlie opposite side of said sur face, and conveying the heat thusproduced to the drier and briqueting machine for op 85 eration upon subsequent por-tions of the culm. and then Without subsequently wetting thel i 'prising effecting a substantially dry separal5; The process of briqueting culin, coni.

tionfo the dust and the coal, and briqueting the coal;

, A16. The process oi' briqucting culin, comprising drying'the onlin, effecting a dry sepa ration of the dust and the coal, and briquets` f 18.1The continuous process of'briqueting culm, compr1sing separating the substan- A100 'gtially inconibusti Vlcniateri'al l'roni the coal,

burning said rejected material, utilizing the 'peat to dry subsequent ortions of colin, and

riqueting the briqueta le material.

`19. The continuous process "of briqueting culm, vcomprising separating the unbriquetable-material from t efbriquetable material, briqueting the briquetable material, burning the unbriquetable material, and drying subi `-fsequent portions of culin by the heat thus 110 produced.` y

2 0. The continuous process oi briqueting :fine coal, comprising separating the dust {frorn thevcoal, burning said dust, separating i and briquetine* subsequent,l portions of coa and dust an utilizing the heat produced 'from the urning pfthe dust for such operaf tions#v J l 2li-.editie continuous process of briquetmg .'-culm','fco1nprising se arating the unbriquet- `120. fable material from t 1c briqi'ietable material, y `briqueting said.- bri( uetable '1 naterial,v burn*H in'gsaid funbiiquetabll Vrating and briqueting subsequent portionsot culniv and utilizino the heat produced "from 12a theburning of the' unbri'quetable material for such operations.

22, The continuous process of briquetinv culni, comprising separating the dust'` an the bony coal from the briquetable material, 13u

@mmm

brqueting the brquetabe material harming E n tastmomy that I claim the foregoing lf the dust and gsiying the bon cog, drying, have hefuna@ sa?, my hand. se Matin" an ri uetinf sul sequent.. oytopns of t e culm, lnd utzing e gas gud. i y @WEGE SERNHM EMME 5 heat produced from the bony rma and duwt Witnesaes: f

to supply heat. vmnd power.l fe? @aid subsew T. L. Hamm; y quent operations. RUM. mmc. 

